Graver-sharpener.



H. A. LANGE. GRAVER SHARPENER.

APPLICATION EILED JAN-15. I917- Patented Sept. 11, 1917.

HUGO A. LANGE, OF LITTLE ROCK, ARKANSAS.

GRAVER-SHARPENEB.

manner.

Application filed January 15, 1917.

To all whom 2'25 may concern:

Be it known that I, HUGO A. Larson, a citizen of the United States,residing at Little Rock, in the county of Pulaski and State of Arkansas,have invented certain new and useful Improvements in. Graver-Sharpeners, of which the following is a specification.

This invention relates to a tool for sharpening gravers, and isespecially intended for the purpose of enabling an engraver or hisassistant to sharpen a number of gravers exactly alike, sometimes verydifficult if not in section.

Fig. 3 is an enlarged sectional view, the tool being in side elevationand the parts constituting my invention being in a slightly differentposition from that shown in Fig. 1.

Fig. a is a detail perspective view of a split block.

Fig. 5 is a detail perspective view of a plug.

In the drawing A represents the tool handle and B the tool. These formno part of the invention, and the invention is not limited in its use tothis one particular kind of tool, which is shown only for the purposesof illustration and in order to more clearly bring out the use of thedevice.

My invention consists of a sleeve 1 having a shghtly reduced portion 2and a boss 3. Working through the boss is a binding screw 4. The innerend of this screw is recessed shown at 5 and in said recess is looselymounted a cylindrical plug 6. Said plug carries a notched binding memberor head 7, as most clearly shown in Fig. 5. Arranged within the sleevein any desired manner is a cooperating notched block 8 which restsopposite to and faces the transversely movable head 7 of the plug 6. Thetool B is passed through the sleeve 1 and the sleeve is then clampedupon the tool by Specification of Letters Patent.

Patented dept. 11, 1.91%.

Serial No. 142,519.

tightening the screw 4: forcing the head 6 of the plug into engagementwith the tool, clamping the tool between the head 7 and the block 8. Thescrew of course rotates with respect to the plug 6.

At its forward end the sleeve carries a yoke 9 which yoke at one end isprovided with a roller 10 extending substantially the width-of the yoke.At the other end it is provided with side brackets 11 in which aremounted rollers 12, and as shown in Figs. 1 and 3 either set of rollersmay be brought into use, the yoke being rotatable on the sleeve, saidyoke carrying between its side members a split block 13 which isrotatable about the reduced portion 2 of the sleeve 1. The block 13 isheld in the yoke and is also clamped to the sleeve by means of a bindingscrew 14, the yoke being slotted longitudinally along one member asshown at 16, and the screw 1 lpassing through said slot and through thesplit portion of the block. The block is suitably flanged as shown at 15so that it is held within the yoke, and at the same time permitted tohave a sliding movement therein. Suitable degree marks are placed uponthe front face of the block 13 and a suitable scale is placed upon onemember of the yoke 9.

The bore of the sleeve is not cylindrical but is rather triangular incross section, thereby afiording a better bearing surface for the tool,as shown in Fig. 2.

In operation the graver is fastened to the device by the screw 4 and theswivel plug 6, about one and a half inches of the tool projecting beyondthe sleeve. The slidable block 13 is then adjusted in the yoke thedesired height, and the sleeve rotated with respect to the block, or theyoke and block with respect to the sleeve, until a suitable mark uponthe sleeve, indicated at w registers with one of the forty-five degreemarks on the block.. It is then clamped by the screw 14, and the deviceis then run back and forth upon the stone, traveling on the rollers 12.It is then adjusted to the other forty five degree mark, and theoperation repeated. Both of the lower sides of the tool must be beveledso that the point is directly in the center of the graver. After thelower sides are finished, the sleeve is turned to bring the mark at .tothe highest point, or the one of ninety degrees. It is then tightenedand the tool inverted, but the sliding adjustment of the block is notdisturbed, and the top of the tool ground, the device traveling on theroller 10. This will give a perfect cutting angle of forty five degrees,and perfectly flat, and the lower sides only are then polished with 4:0emery paper.

time to complete the entire operation.

WVhat I claim is:

1. A device of the kind described com prising a sleeve, means forclamping said sleeve to a tool to be sharpened, a block rotatablymounted on said sleeve, a yoke adjustably connected to said block, androllers carried by said yoke and adapted to support the yoke, sleeve andtool. e

2. The combination with a tool, a sleeve adapted to fit thereon, meansfor clamping to the tool, a split block rotatably mounted This completesthe sharpening of the tool and 1t requlres about one minutes' upon saidsleeve, and a yoke mounted upon said block, the block being slidablebetween the yoke members, and suitable graduation marks carried by thesleeve, block and yoke respectively.

3. A graver sharpener consisting of a sleeve adapted to receive thegraver, a screw working transversely in the sleeve, a plug fittingloosely in the inner end of the screw and projecting therefrom andadapted to engage said graver, a split block rotatably mounted on saidsleeve, ,a yoke adjustably mounted on said block,,:rollers carried bythe ends respectively of the yoke, and ,a binding screw working throughsaid yoke and block. 7

' In testimony whereof I aflix tur e. A A

HUGO A. LANGE.

Copies of this patent may be obtained for five cents each, by,addressingathe Commissioner of iatentjs, Washington, I). 0.

my signa-

